The utmost importance in an arrangement is the overall harmony and balance. It is possible to combine two or more flowers in one floral design, but in this case choosing flowers that are compatible with each other is of utmost importance. In other words, the key to a well_balanced arrangement is to choose flowers that can strengthen the beauty of each other. What's important to getting the most out of the components of an arrangement is the harmony between the floral material and the container, as well as the overall balance. No matter how beautiful a flower may be on its own, if it does not harmonize with the rest of the material, the balance is lost and the beauty of the flower is wasted.
If the flowers appear too bunched up, try cutting them at different lengths for more variety. Don't worry if some blooms don't stay in exactly the right position at first. Continue to the process by adding more flowers, adjusting their height and position as you go. The stems should all fit comfortably in the neck of the container and begin to hold their positions better as more flowers are added.